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United States Patent | 5,700,135 |
Inokuchi ,   et al. | December 23, 1997 |
A cam plate pump comprises a pressurizing chamber formed by a bellows which elongates and contracts along a center axis parallel to the input shaft of the pump. The cam plate rotates together with the input shaft, and compresses the bellows via a piston. A mechanism for guiding the piston along the center axis, and a mechanism for blocking the rotational torque acting on the bellows via the piston are provided. These mechanisms prevent a bending load or twisting load from acting on the bellows.
Inventors: | Inokuchi; Iwane (Yokohama, JP); Kamegaya; Shigeru (Yokohama, JP); Oshidari; Toshikazu (Yokohama, JP); Sakamoto; Atsuhiro (Yokohama, JP) |
Assignee: | Nissan Motor Co., LTD. (Kanagawa, JP) |
Appl. No.: | 598580 |
Filed: | February 12, 1996 |
Feb 24, 1995[JP] | 7-037201 |
Current U.S. Class: | 417/269; 92/36; 92/71; 417/473 |
Intern'l Class: | F04B 043/00 |
Field of Search: | 417/269,473 92/71,36,37 |
1715735 | Jun., 1929 | Banning, Jr. | 417/473. |
2392279 | Jan., 1946 | Woods | 92/71. |
2889781 | Jun., 1959 | Thompson | 92/71. |
4010621 | Mar., 1977 | Raetz | 60/516. |
4723894 | Feb., 1988 | Marx | 417/269. |
4801249 | Jan., 1989 | Kakizawa | 417/269. |
4902206 | Feb., 1990 | Nakazawa et al. | 92/37. |
Foreign Patent Documents | |||
2-7385 | Jan., 1990 | JP. | |
4-191461 | Jul., 1992 | JP. |